Edit post

Edit your reply below.

Post Body
Enter your post below.
I've been toying with building one for myself. To do it right it's a MAJOR engineering challenge if you want a properly protected high-power unit. Power supply manufacturers cheat by using trasformers with a high resistance in the secondary windings. While this creates heat at high loadings, it also limits the current flow during shorts. They also cheat by not trying to regulate the output voltage and letting it drift all over the place. The better but more technical option is to design an electronic current limiter, preferably with a crowbar action to drastically limit the current output at very low output voltages. I once designed one with all the bells and whistles, and the material costs were in excess of $200. Cheaper to buy one unless you just HAVE TO HAVE a 10 amp DC power supply for your train. Mark in Utah
Tags (Optional)
Tags are keywords that get attached to your post. They are used to categorize your submission and make it easier to search for. To add tags to your post type a tag into the box below and click the "Add Tag" button.
Add Tag

Update Reply

Login, or register today to interact in our online community, comment on articles, receive our newsletter, manage your account online and more!

Model Railroader Newsletter See all

Sign up for our FREE e-newsletter and get model railroad news in your inbox!